这是一个图形化工具类
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.Random;
/**
- 验证码工具类
- @author yinsiyao
/
public class CodeUtil {
private static final char[]chars= {
‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’,
‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’, ‘g’, ‘h’, ‘i’, ‘j’, ‘k’, ‘l’, ‘m’, ‘n’,
‘o’, ‘p’, ‘q’, ‘r’, ‘s’, ‘t’, ‘u’, ‘v’, ‘w’, ‘x’, ‘y’, ‘z’,
‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘G’, ‘H’, ‘I’, ‘J’, ‘K’, ‘L’, ‘M’, ‘N’,
‘O’, ‘P’, ‘Q’, ‘R’, ‘S’, ‘T’, ‘U’, ‘V’, ‘W’, ‘X’, ‘Y’, ‘Z’
};
private static final int SIZE=4;
private static final int LINES=5;
private static final int WIDTH=80;
private static final int HEIGHT=40;
private static final int FONT_SIZE=30;
public static Object[]createImage(){
StringBuffer sb=new StringBuffer();
BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
Graphics graphic = image.getGraphics();
graphic.setColor(Color.LIGHT_GRAY);
graphic.fillRect(0, 0, WIDTH, HEIGHT);
Random random = new Random();
for(int i=0;i<SIZE;i++) {
int n=random.nextInt(chars.length);
graphic.setColor(getRandomColor());
graphic.setFont(new Font(null, Font.BOLD+Font.ITALIC, FONT_SIZE));
graphic.drawString(chars[n]+"", iWIDTH/SIZE, HEIGHT*2/3);
sb.append(chars[n]);
}
for(int i=0;i<LINES;i++) {
graphic.setColor(getRandomColor());
graphic.drawLine(random.nextInt(WIDTH), random.nextInt(HEIGHT), random.nextInt(WIDTH), random.nextInt(HEIGHT));
}
return new Object[] {sb.toString(),image};
}
public static Color getRandomColor() {
Random random = new Random();
Color color = new Color(random.nextInt(256),
random.nextInt(256), random.nextInt(256));
return color;
}
}
下面是生成验证码的control类
@Controller
public class LoginController {
// 生成验证码
@RequestMapping(value = “/getcode”, method = RequestMethod.GET)
public void getCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
response.setContentType(“image/png”);
response.setHeader(“Pragma”, “No-cache”);
response.setHeader(“Cache-Control”, “no-cache”);
response.setDateHeader(“Expire”, 0);
Object[] objs = CodeUtil.createImage();
String mm = (String) objs[0];
System.out.println(“Code:” + mm);
try {
HttpSession session = request.getSession();
session.removeAttribute(“imgcode”);
session.setAttribute(“imgcode”, objs[0]);
BufferedImage image = (BufferedImage) objs[1];
OutputStream outputStream = response.getOutputStream();
ImageIO.write(image, “png”, outputStream);
} catch (Exception e) {
e.printStackTrace();
}
}
}
下面是生成的样子
